diff --git a/configure b/configure
index 14ef738b6c..dd01911e37 100755
--- a/configure
+++ b/configure
@@ -3052,12 +3052,12 @@ if test "$cap_ng" = "yes" ; then
   echo "CONFIG_LIBCAP=y" >> $config_host_mak
 fi
 for card in $audio_card_list; do
-    def=CONFIG_`echo $card | tr '[:lower:]' '[:upper:]'`
+    def=CONFIG_`echo $card | LC_ALL=C tr '[a-z]' '[A-Z]'`
     echo "$def=y" >> $config_host_mak
 done
 echo "CONFIG_AUDIO_DRIVERS=$audio_drv_list" >> $config_host_mak
 for drv in $audio_drv_list; do
-    def=CONFIG_`echo $drv | tr '[:lower:]' '[:upper:]'`
+    def=CONFIG_`echo $drv | LC_ALL=C tr '[a-z]' '[A-Z]'`
     echo "$def=y" >> $config_host_mak
     if test "$drv" = "fmod"; then
         echo "FMOD_CFLAGS=-I$fmod_inc" >> $config_host_mak
@@ -3618,7 +3618,7 @@ echo "TARGET_INT_ALIGNMENT=$target_int_alignment" >> $config_target_mak
 echo "TARGET_LONG_ALIGNMENT=$target_long_alignment" >> $config_target_mak
 echo "TARGET_LLONG_ALIGNMENT=$target_llong_alignment" >> $config_target_mak
 echo "TARGET_ARCH=$TARGET_ARCH" >> $config_target_mak
-target_arch_name="`echo $TARGET_ARCH | tr '[:lower:]' '[:upper:]'`"
+target_arch_name="`echo $TARGET_ARCH | LC_ALL=C tr '[a-z]' '[A-Z]'`"
 echo "TARGET_$target_arch_name=y" >> $config_target_mak
 echo "TARGET_ARCH2=$target_arch2" >> $config_target_mak
 # TARGET_BASE_ARCH needs to be defined after TARGET_ARCH
diff --git a/scripts/create_config b/scripts/create_config
index 0098e683e2..470e05e397 100755
--- a/scripts/create_config
+++ b/scripts/create_config
@@ -16,7 +16,7 @@ case $line in
  prefix=* | [a-z]*dir=*) # directory configuration
     name=${line%=*}
     value=${line#*=}
-    define_name=`echo $name | tr '[:lower:]' '[:upper:]'`
+    define_name=`echo $name | LC_ALL=C tr '[a-z]' '[A-Z]'`
     eval "define_value=\"$value\""
     echo "#define CONFIG_QEMU_$define_name \"$define_value\""
     # save for the next definitions
@@ -48,7 +48,7 @@ case $line in
     ;;
  ARCH=*) # configuration
     arch=${line#*=}
-    arch_name=`echo $arch | tr '[:lower:]' '[:upper:]'`
+    arch_name=`echo $arch | LC_ALL=C tr '[a-z]' '[A-Z]'`
     echo "#define HOST_$arch_name 1"
     ;;
  HOST_USB=*)
@@ -73,7 +73,7 @@ case $line in
  TARGET_BASE_ARCH=*) # configuration
     target_base_arch=${line#*=}
     if [ "$target_base_arch" != "$target_arch" ]; then
-      base_arch_name=`echo $target_base_arch | tr '[:lower:]' '[:upper:]'`
+      base_arch_name=`echo $target_base_arch | LC_ALL=C tr '[a-z]' '[A-Z]'`
       echo "#define TARGET_$base_arch_name 1"
     fi
     ;;
diff --git a/scripts/tracetool b/scripts/tracetool
index 65bd0a1b4c..d675daba2b 100755
--- a/scripts/tracetool
+++ b/scripts/tracetool
@@ -410,7 +410,7 @@ linetoh_dtrace()
     args=$(get_args "$1")
     argnames=$(get_argnames "$1", ",")
 
-    nameupper=`echo $name | tr '[:lower:]' '[:upper:]'`
+    nameupper=`echo $name | LC_ALL=C tr '[a-z]' '[A-Z]'`
 
     # Define an empty function for the trace event
     cat <<EOF
@@ -539,7 +539,7 @@ convert()
         fi
         if [ "$1" = "h" ]; then
             name=$(get_name "$str")
-            NAME=$(echo $name | tr '[:lower:]' '[:upper:]')
+            NAME=$(echo $name | LC_ALL=C tr '[a-z]' '[A-Z]')
             echo "#define TRACE_${NAME}_ENABLED ${enabled}"
         fi
     done